AHA (Alpha-Hydroxy Acids and BHA (Beta Hydroxy Acids) are both acids that are used in my peels to exfoliate the skin, and you should familiarize yourself with both if you are wanting to improve your skin's appearance based on your skin type.
A very popular AHA, that I use, is Glycolic Acid. It comes from sugar cane and is the smallest of the AHAs but is also widely used for the resurfacing of the skin. AHAs shed dead skin cells from both the epidermis (most outer layer of the skin) and the dermis (deep layer of the skin beneath the epidermis). Exfoliation using AHAs promotes healthy skin growth to reveal a more youthful glow to the skin.
AHAs increase collagen by producing healthy skin cells and increasing degradation of the existing dead cells.
A common BHA is Salicylic Acid which is a fat-soluble. This meaning it is best used on oily skin types...most commonly, acne. This elevated capability deeply penetrates pores and helps fight the bacteria beneath the skin.
Neither type is better. It all just depends on what kind of skin conditions you are dealing with as to what acid would be more beneficial to your skin. The biggest difference is that BHAs can target excess sebum (oil beneath the skin's surface).
CHOOSING WHICH IS RIGHT FOR YOU...
*helps even skin tone
*diminishes fine lines and softens wrinkles
*helps with age spots, scars, melasma and hyperpigmentation such as rosacea
If you have dry or sensitive skin, I will use caution in using this product and allow your skin to gradually build a tolerence to it.
Use these acids if you want to tackle oily or acne skin.